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Potential at a point A is 3 volt and at ...

Potential at a point A is 3 volt and at a point B is 7 volt, an electron is moving towards A from B. Then:

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The correct Answer is:
A, C
`V_(A)=3` volt, `V_(B)=7` volt
From energy conservation `("Energy")_(A)=("Energy")_(B)`
`rArr 1//2 mv^(2)-exx7V=-exx3V+0`
`rArr 1//2 mv^(2)=4eV`
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